We live in bizarro times. Suddenly, it is controversial to state obvious, neon-bright truths. This week, it has become newsworthy to observe that illegal border-crossers who circumvent required medical screenings are a threat to America's public health and safety. Just look at these hyperventilating headlines and tweets. From Newsweek, which is supposed to, you know, report actual news of the week: "'We don't know what people have': Laura Ingraham calls migrant caravan a health issue." And from The Daily Beast: "Fox & Friends Host Brian Kilmeade Fears 'Diseases' Brought By Migrant Caravan." This is not "news." It's propaganda recycled and...